... . Offer single-sided/double-sided pcb, multilayer pcb, rigid board, flexible pcb, pcb assembly and so on. 2 Layer PCB BoardPCB/FPC Product Technic ParameterItemParameterDouble ... secondSurface FinishingOSP, HAL, Immersion gold , Gold plating, Rosin, Gold fingerOSP, HAL, Immersion gold , Gold plating, Rosin, Gold fingerQaulity standardIPC-A-600F IPC ...